JP2004197567A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize further size and weight reductions by separating lubricating oil in a small space. <P>SOLUTION: A refrigerant circulating passage 34 is provided in a container 3, which circulates a refrigerant 30 discharged from a compression mechanism part 4 into a container 3 around an axial line X of a compressor 1 by introducing the refrigerant 30 from a refrigerant inlet 32 and which returns the refrigerant 30 from a refrigerant returning port 33 to a discharging port 9 side of the container 3 while centrifuging or centrifugal collision separation is being conducted. The separated liquid 7 is recovered by providing a liquid return port 35 for returning the centrifuged liquid 7 to the inside of the container 3 so as to have a gravity-directional component in a passage wall on the way and in such a direction as to be deviated from a circumferential direction of the refrigerant 30. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a compressor having at least a compression mechanism for sucking, compressing and discharging refrigerant, and a liquid storage for storing a liquid for lubricating a sliding portion including the compression mechanism in a container. It is about.
[0002]
[Prior art]
This type of compressor is closed by connecting the container to a refrigeration cycle. When the compression mechanism is driven, the refrigerant in the refrigeration cycle is sucked through the suction port of the container, compressed, discharged into the container, and then repeatedly supplied to the refrigeration cycle from the discharge port of the container. At the same time, the lubricating oil stored in the oil storage section in the container is supplied to the sliding section including the compression mechanism section directly or by carrying with a refrigerant to lubricate the sliding section. This enables maintenance-free operation. The refrigerant discharged from the compression mechanism by such a lubrication mechanism and supplied to the refrigeration cycle contains lubricating oil. Lubricating oil contained in the refrigerant supplied to the refrigeration cycle causes a decrease in the function of the refrigeration cycle. In addition, if a large amount of lubricating oil circulates in the refrigeration cycle at the same time, lubrication of the sliding part in the container becomes insufficient. To compensate for this, the oil storage part and the amount of lubricating oil are increased, and the compressor becomes larger and heavier. .
[0003]
Therefore, conventionally, a technique is known in which liquid in a refrigerant discharged from a compression mechanism is centrifuged before being supplied to a refrigeration cycle and returned to an oil storage section of a container (for example, Patent Document 1). , 2). In these, the refrigerant discharged from the compression mechanism is introduced tangentially into the upper part of a cylindrical centrifugal separation chamber provided in a direction perpendicular to the axis, so that the refrigerant introduced is directed downward along the cylindrical surface. The centrifugal separation of the lubricating oil accompanying the refrigerant by forming a helical flow, the centrifuged refrigerant flows upward from the lower part of the centrifugal chamber through its central part and is supplied to the refrigeration cycle, and the centrifugally separated lubricating oil Is blown into the container from the lower part of the centrifugal separation chamber and returned to the lubrication section. The lubricating oil is centrifuged with respect to the refrigerant by a so-called cyclone method.
[0004]
The one described in Patent Document 2 particularly blows out the lubricating oil after centrifugation in parallel to the oil level of the oil storage section so that the oil level does not fluctuate, thereby keeping the lubricating oil level in the liquid storage section constant. While stabilizing the supply of the lubricating oil to the sliding portion, it is possible to prevent the liquid in the oil storage portion from flowing back into the centrifugal separation chamber due to fluctuations in the oil level.
[0005]
[Patent Document 1]
JP-A-07-15083
[0006]
[Patent Document 2]
JP-A-11-083522
[0007]
[Problems to be solved by the invention]
By the way, the compressor built in the container as described above has been mounted for cooling and heating of automobiles, and some electric compressors for room air conditioners have been used, but with the increasing environmental and energy problems, Therefore, there is a demand for a lighter vehicle. In particular, since a driving force at the level of a gasoline-powered vehicle cannot be obtained during electric running of an electric vehicle or a hybrid vehicle, weight reduction of the vehicle has become the most important issue. Therefore, for a compressor that is a relatively heavy object, particularly an electric compressor that also incorporates a motor that increases in size and weight, it is important to reduce the size and weight of the compressor as in the case of mounting on a vehicle. .
[0008]
However, the cyclone-type lubricating oil separation mechanism employed in the conventional compressor described above centrifugates the lubricating oil contained as a spiral flow along the cylindrical surface of the cylindrical centrifugal separation chamber onto the cylindrical surface. The flow of the refrigerant during centrifugal separation toward the lower part of the centrifugal separation chamber and the lower part of the centrifugal separation chamber are lifted up the central part while pressing and separating with the force, thus leaving the lubricating oil pressed against the cylindrical surface. It is necessary to have an area that can secure the flow of the refrigerant after centrifugal separation, which is to be discharged and discharged. For this reason, even if a cylindrical wall for isolating these flows is provided, the mechanism has a relatively large diameter, and the axial space occupied in the compressor container becomes large, which hinders miniaturization and weight reduction. become.
[0009]
An object of the present invention is to provide a compressor that can separate lubricating oil in a small space and that can be further reduced in size and weight.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a compressor of the present invention includes, in a container, a compression mechanism that sucks, compresses, and discharges a refrigerant, and lubricates a sliding portion including the compression mechanism. In a compressor having at least a liquid storage unit for storing a liquid to be processed, a refrigerant discharged from a compression mechanism into a container is introduced from a refrigerant inlet and circulates around the axis of the compressor to centrifuge or centrifuge the liquid. A refrigerant circulation path for returning from the refrigerant return port to the discharge port side of the container while colliding and separating is provided in the container, and a liquid return port for returning the liquid to be centrifugally separated into the container has a gravity direction component in a passage wall in the middle. Another feature is that the refrigerant is provided in a direction deviating from the circulation direction of the refrigerant.
[0011]
In such a configuration, the refrigerant circulating passage is introduced from the refrigerant introduction port to restrict the refrigerant that is discharged from the compression mechanism portion into the container and headed toward the discharge port of the container from the refrigerant introduction port and circulates around the axis of the compressor. Return from the return port to the discharge port side of the container. At this time, the refrigerant circulation passage separates the liquid contained in the refrigerant to be circulated by centrifugal force or centrifugal force and collision action according to the passage form and leaves the liquid on the centrifugal direction side of the refrigerant circulation passage or on the passage wall surface on the gravity direction side. The refrigerant advances and returns to the inside of the container from the refrigerant return port.The separated liquid passes through the liquid return port on the middle wall of the passage and blows out the refrigerant by deviating from the circumferential direction of the refrigerant and having a gravitational direction component. Return into container without looking. Accordingly, the refrigerant circulation path can be separated from the refrigerant and the liquid only by circulating the refrigerant discharged from the compression mechanism in one direction, and is a wide path as in a case where a reverse flow of the refrigerant is secured as in a cyclone system. And the separation performance is proportional to that by obtaining a long circulation distance inside the container.Therefore, there is no decrease in liquid separation performance as long as it is elongated in the circumferential direction and the width in the axial direction of the compressor is extremely small. Furthermore, the size and weight of the compressor can be further reduced.
[0012]
The compressor of the present invention also has a compression mechanism that sucks, compresses, and discharges a refrigerant in a container, and a liquid storage that stores a liquid that lubricates a sliding part including the compression mechanism. In a horizontal compressor that is installed at least diagonally or horizontally, the refrigerant discharged into the container from the compression mechanism is introduced from the refrigerant inlet at the upper part of the container around the axis of the compressor. While providing a refrigerant circulation path for returning from the refrigerant return port in the upper part of the container at the discharge port side of the container while spinning and centrifuging or centrifuging and separating the liquid, the return port for returning the liquid to be centrifuged into the container is low. Another feature is that the passage wall on the side has a gravity direction component and is provided in a direction deviating from the circumferential direction of the refrigerant.
[0013]
In such a configuration, the refrigerant circulation path is located around the oblique or horizontal axis of the compressor, and the refrigerant that is discharged from the compression mechanism into the container and is on the way to the discharge port of the container is stored in the container. After being introduced and confined from the refrigerant introduction port located at the upper part of the container away from the liquid to be circulated and circling around the axis, the refrigerant at the upper part of the container distant from the liquid stored in the container The liquid can be returned from the return port to the discharge port side of the container without affecting the stored liquid. At this time, the refrigerant circulation passage separates the liquid contained in the refrigerant to be circulated by centrifugal force or centrifugal force and collision action according to the passage form and leaves the liquid on the centrifugal direction side of the refrigerant circulation passage or on the passage wall surface on the gravity direction side. The refrigerant is advanced and returned into the container from the refrigerant return port in the upper part of the container, and the separated liquid is collected at the lower position of the refrigerant circulation path, and is passed through the liquid return port provided in the lower halfway passage wall. Since the refrigerant deviates from the circumferential direction and has a gravitational direction component, the refrigerant is gently returned to or near the stored liquid in the container without seeing the blowing of the refrigerant. Accordingly, the refrigerant circulation path can be separated from the refrigerant and the liquid only by circulating the refrigerant discharged from the compression mechanism in one direction, and is a wide path as in a case where a reverse flow of the refrigerant is secured as in a cyclone system. And the separation performance is proportional to that by obtaining a long circulation distance inside the container.Therefore, there is no decrease in liquid separation performance as long as it is elongated in the circumferential direction and the width in the axial direction of the compressor is extremely small. Furthermore, the size and weight of the compressor can be further reduced.
[0014]
The coolant circulation passage may be provided in a spiral shape as the case may be. However, the additional configuration provided on the same plane minimizes the axial space of the compressor occupied by the refrigerant circulation passage, which easily contributes to downsizing and weight reduction of the compressor. Moreover, by providing the refrigerant circulation path with a spiral overlapping portion, it is possible to further increase the liquid separation function by providing the refrigerant circulation path with a length exceeding the circumferential dimension inside the container without increasing the axial space. it can.
[0015]
The refrigerant circulation passage may be provided at any part between the discharge position from the compression mechanism in the container and the discharge port of the container. However, with the further configuration provided in the end portion of the container on the discharge port side, the container can be easily provided with a high degree of freedom by utilizing a wider plane area in a direction perpendicular to the axis avoiding the objects in the container.
[0016]
The refrigerant circulation passage can be formed in any manner, for example, by bending a ready-made tube. However, according to a further configuration formed by a concave portion formed on the end wall of the container or the substrate attached to the container and a lid member covering the concave portion, the end wall or the substrate is formed by molding or engraving. By covering the formed ridge with a lid member and closing it, any shape can be easily and accurately formed, and the lid member circulates the refrigerant discharged from the compression mechanism from the refrigerant inlet through the refrigerant circulation port. This is convenient because a partition wall for partitioning the inside of the container can be shared for introduction into the passage. In particular, when a concave stripe is formed on the end wall of the container, a special member for forming the concave stripe can be omitted, which is advantageous for cost reduction, and is not easily disturbed and is suitable for space saving of the container. It is. In addition, since the refrigerant circulation path is located at the end of the container on the discharge port side, the cooling of equipment inside the container by the refrigerant and the lubrication of sliding parts other than the compression mechanism such as the bearing by the lubricating oil contained in the refrigerant, etc. After being used, there is an advantage that the lubricating oil can be separated and discharged out of the container and supplied to an external cycle.
[0017]
The substrate and the lid member may be attached to any position of the container, or may be individually attached. However, according to the further configuration in which the substrate is attached to the container together with the lid member, the labor for attachment is reduced by half, and the cost can be reduced.
[0018]
A plurality of refrigerant introduction ports, refrigerant return ports, and liquid return ports may be respectively provided in the circumferential direction or in the axial direction of the compressor. However, it is only necessary to provide at least one in the circumferential direction, and the structure is simplified.
[0019]
A refrigerant introduction guide is provided at the refrigerant inlet to collect the refrigerant in a wider area and guide it to the refrigerant inlet. In a further configuration, the refrigerant in a wider area than the refrigerant inlet is collected and introduced into the refrigerant circuit path. By doing so, the circulation speed in the refrigerant circulation path is increased by the amount of the introduced refrigerant, so that the centrifugal effect, or the centrifugal and collision separation effects by the circulation of the refrigerant is improved.
[0020]
In a further configuration in which an electric motor for driving the compression mechanism is housed in the container, an external drive source is not required, but the size and weight are easily reduced. There is an advantage that can be achieved.
[0021]
Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be employed alone or in combination in various combinations as much as possible.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
A compressor according to an embodiment of the present invention will be described in detail with reference to FIGS. This embodiment shows one example of the case of a horizontal scroll compressor for a refrigerating cycle, which is installed sideways by mounting legs 2 around the body of the compressor 1 as shown in FIG. A compression mechanism 4 and a motor 5 for driving the compression mechanism 4 are built in a container 3 of the compressor 1, and a liquid storage section 6 for storing a liquid for lubricating each sliding portion including the compression mechanism 4 is provided. The refrigerant handled is a gas refrigerant, but when it contains a liquid refrigerant, it can be treated and separated as if it were liquid separated from the refrigerant. A liquid such as a lubricating oil 7 is used as a liquid provided for lubrication of each sliding portion and sealing of the sliding portion of the compression mechanism 4. Further, it is compatible with the refrigerant. However, the present invention is not limited to these. Basically, a compression mechanism 4 for sucking, compressing, and discharging the refrigerant, and a liquid storage 6 for storing a liquid for lubricating a sliding portion including the compression mechanism 4 are provided in the container 3. The following description is not intended to limit the description in the claims.
[0023]
As shown in FIG. 4, the compression mechanism 4 of the compressor 1 according to the present embodiment is formed by engaging a fixed spiral part 11 and a swirling spiral part 12 with blades rising from the fixed head 11a and the rotating head 12a. When the space 10 is caused to move in a circular orbit relative to the fixed spiral part 11 by the electric motor 5 through the drive shaft 14 by the electric motor 5, the volume changes with the movement. The suction, compression and discharge to the external cycle of the refrigerant 30 are performed through the suction port 8 and the discharge port 9 shown in FIG.
[0024]
At the same time, the lubricating oil 7 stored in the liquid storage section 6 of the container 3 drives the positive displacement pump 13 or the like with the drive shaft 14 or utilizes the differential pressure in the container 3 to drive the drive shaft 14. The liquid is supplied to the liquid pool 21 or the liquid pool 22 on the back surface of the swirling spiral part 12 with the swirling drive of the swirling spiral part 12, the liquid pool 21 in the example shown in the drawing, and the lubricating oil 7 supplied to the liquid pool 21 is further The lubricating oil 7 is swirled through the swirl spiral part 12 while supplying the lubricating oil 7 to the back side of the outer periphery of the swirl spiral part 12 through the swirl spiral part 12 under a predetermined restriction such as an aperture 23 to back up the swirl spiral part 12. The tip of the blade of the component 12 is supplied to a holding groove 25 for holding a tip seal 24 which is an example of a seal member between the fixed spiral component 11 at the tip and fixed and revolved. Reduce the fine lubrication.
[0025]
In particular, the compressor 1 of the present embodiment has a refrigerant circulating passage for circulating the refrigerant 30 discharged into the container 3 from the discharge port 31 of the compression mechanism 4 around the axis X of the compressor 1 as shown in FIG. 34 are provided. The refrigerant circulation passage 34 introduces the refrigerant 30 from the refrigerant inlet 32 as shown by a broken arrow in FIGS. 1 and 4 and around the axis X of the compressor 1 as shown by a broken arrow in FIGS. 2 and 3. By causing the lubricating oil 7 to be mixed with and mixed with the refrigerant 30 by being circulated, the lubricating oil 7 is centrifuged or centrifugally separated as shown by a solid line arrow in FIGS. Return from the refrigerant return port 33. In the coolant circulation path 34, a liquid return port 35 for returning the lubricating oil 7 to be centrifugally separated into the container 3 is provided on the passage wall in a direction having a gravity direction component and deviating from the circulation direction of the refrigerant. .
[0026]
As shown in FIG. 1 and FIG. 2, the refrigerant circulation passage 34 has a large curved portion 34 a having a substantially concentric large curvature close to the inside of the container 3 having an axis X common to the compression mechanism 4 and the electric motor 5. At both ends, and between them, a small curved portion 34b having a smaller radius of curvature than the large curved portion 34a and a substantially linear portion 34c are alternately connected to form a passage form. The lubricating oil 7 therein is mainly centrifuged. However, when the lubricating oil 7 enters the small curved portion 34b from the large curved portion 34a, or enters the small curved portion 34b from the straight portion 34c, the refrigerant 30 is caused to pass through the passage wall in accordance with the sharpness of the change in the circulation direction of the refrigerant 30. The lubricating oil 7 can collide and separate by this collision action.
[0027]
Such collision separation becomes stronger as the circulation direction of the refrigerant 30 changes rapidly, and the separation effect increases. For this purpose, a bent portion or a collision wall may be provided in the middle of the refrigerant circulation passage 34. In the example shown by the phantom line in FIG. 2, the collision wall 36 is provided on the downstream side of the liquid return port 35 of the refrigerant circulation path 34, and the collision wall 36 collides with the refrigerant 30 that is going to be returned into the container 3 through the liquid return port 35. Thus, the lubricating oil 7 can be finally separated. When such a collision wall 36 is provided immediately downstream of the liquid return port 35 as shown by a broken line in FIG. 2, the refrigerant that passes through the liquid return port 35 collides to further separate the lubricating oil 7. While promoting, it is possible to prevent the lubricating oil 7 separated from the refrigerant 30 up to that point and to prevent the lubricating oil 7 from moving downstream, and to increase the recovery rate into the container 3 through the liquid return port 35. However, if there is a portion for separating the lubricating oil 7 downstream of the collision wall 36, an escape path that does not hinder the separated lubricating oil 7 from returning to the liquid return port 35, or downstream of the collision wall 36. It is necessary to provide another liquid return port 35 so that the liquid can be returned into the container 3. Such a collision wall 36 also forms a so-called throttle portion in which the passage of the refrigerant circulation passage 34 is narrowed between the wall and the opposing wall of the refrigerant circulation passage 34. Gas-liquid separation can be performed. However, the throttle portion for gas-liquid separation can be provided irrespective of the presence or absence of the collision wall 36, and the opposing wall of the refrigerant circulation path 34 is cut so that the projecting wall 36 does not form the above-described throttle portion. A relief part can be formed.
[0028]
The refrigerant circulation path 34 as described above introduces the refrigerant 30 discharged from the compression mechanism 4 into the container 3 and on the way to the discharge port 9 of the container 3 from the refrigerant introduction port 32 to restrict the refrigerant 30 so that the axis X of the compressor 1 After being circulated around as shown by the dashed arrows in FIGS. 1 and 2, the refrigerant is returned from the refrigerant return port 33 to the discharge port 9 side of the container 3. At this time, the refrigerant circulating passage 34 separates the lubricating oil 7 contained in the circulated refrigerant 30 by centrifugal force or centrifugal force and collision action according to the above-described passage form, and on the centrifugal side of the refrigerant circulating passage 34 or The refrigerant advances while returning to the vessel 3 from the refrigerant return port 33 while remaining on the wall surface of the passage in the direction of gravity, and the separated lubricating oil 7 is removed from the circulation direction of the refrigerant 30 through the liquid return port 35 provided in the middle wall of the path. In addition, the refrigerant is returned into the container 3 without seeing the blowing of the refrigerant due to the direction having the gravity direction component. Such recovery of the lubricating oil 7 separated from the refrigerant 30 into the container 3 through the liquid return port 35 is performed in such a manner that the liquid return port 35 is directed at an acute angle equal to or less than a right angle with respect to the circumferential direction of the refrigerant 30 and in the direction of gravity. The more the direction matches, the smoother the operation and the higher the recovery rate.
[0029]
As a result, the refrigerant circulation path 34 can separate the refrigerant 30 and the lubricating oil 7 only by circulating the refrigerant 30 discharged from the compression mechanism unit 4 in one direction, so that the refrigerant circulation path 34 is different from a swirl flow like a cyclone system. It is not necessary to have a wide passage as in the case of securing the flow, and a long orbital distance close to the perimeter can be obtained inside the container 3 and the separation performance can be exhibited in proportion thereto. As the width in the direction of the axis X is extremely small, the compressor 1 can be further reduced in size and weight by increasing the lubricating oil 7 without deteriorating the separation performance. In the example shown in FIG. 4, the dimension in the axis X direction is about 1/24 of the length in the axis X direction of the compressor 1 having the compression mechanism 4 and the electric motor 5.
[0030]
In the case where the refrigerant circulation path 34 as described above is provided, there is also a special case where the axis X is oblique from a more specific viewpoint in consideration of the fact that the present embodiment is the horizontal compressor 1. The refrigerant 30 discharged from the compression mechanism 4 into the container 3 is introduced through the refrigerant inlet 32 at the upper part of the container 3 shown in FIGS. 1, the refrigerant shown in FIGS. 1, 2 and 4 in the upper part of the container 3 on the discharge port 9 side of the container 3 while being centrifuged or centrifugally separated by collision by rotating the lubricating oil 7 as shown by the dashed arrow in FIG. A coolant circulation path 34 is provided so as to return from the return port 33, and a liquid return port 35 for returning the centrifugally separated lubricating oil 7 into the container 3 is at a lower position as shown in FIGS. 1, 2, and 4. A direction that has a gravity direction component on the way wall and deviates from the circulation direction of the refrigerant 30 It is provided. In the illustrated example, the liquid return port 35 coincides with the direction of gravity.
[0031]
Such a refrigerant circulation passage 34 is located around an oblique or horizontal axis X of the compressor 1 as shown in FIGS. 1, 2, and 4, and is discharged from the compression mechanism 4 into the container 3 and The refrigerant 30 on the way to the discharge port 9 of the container 3 is introduced without being affected by the stored lubricating oil 7 from the refrigerant inlet 32 located in the upper part of the container 3 remote from the lubricating oil 7 stored in the container 3. After rotating around the axis X, the refrigerant is returned to the discharge port 9 side of the container 3 from the refrigerant return port 33 in the upper part of the container 3 away from the lubricating oil 7 stored in the container 3 without affecting the stored lubricating oil 7. be able to.
[0032]
At this time, the refrigerant circulation path 34 separates the lubricating oil 7 contained in the refrigerant 30 to be circulated by the centrifugal force or the centrifugal force according to the path form and the collision action as described above, or on the centrifugal side of the refrigerant circulation path 34 or In addition, the refrigerant 30 is advanced while leaving it on the passage wall surface on the gravity direction side and returned into the container 3 from the refrigerant return port 33 in the upper part of the container 3, and the separated lubricating oil 7 is lowered to the lower position of the refrigerant circulation path 34 in FIG. By using the gathering as shown by the arrow, through the liquid return port 35 provided in the lower halfway passage wall, the refrigerant 30 is blown out by being deviated from the circumferential direction of the refrigerant and having a gravitational direction component. The lubricating oil 7 can be returned to the vicinity of or within the lubricating oil 7 without seeing.
[0033]
As a result, the refrigerant circulation path 34 can separate the refrigerant 30 and the lubricating oil 7 only by circulating the refrigerant 30 discharged from the compression mechanism unit 4 in one direction, so that the refrigerant 30 and the lubricating oil 7 are separated from the swirling flow of the cyclone system. It is not necessary to use a wide passage as in the case where the compressor 1 is secured, and it is possible to obtain a long circling distance close to the circumferential length inside the container 3 and to exert a separating performance in proportion thereto, so that the axis of the compressor 1 is elongated in the circumferential direction. As the width in the X direction is extremely small, the lubricating oil 7 can be increased in size without deteriorating the separation performance, and the compressor 1 can be further reduced in size and weight.
[0034]
Here, the coolant circulation path 34 can be provided in a spiral shape to extend the circulation distance. However, in this embodiment, they are provided on the same plane as shown in FIG. 1, FIG. 2, and FIG. Thereby, the space around the axis X of the compressor 1 occupied by the refrigerant circulation passage 34 is minimized to fit within the width of the single refrigerant circulation passage 34, and it is easy to contribute to the reduction in size and weight of the compressor 1. In addition, as shown in FIGS. 1 and 2, the coolant circulation passage 34 has a spiral overlapping portion 34e so that the refrigerant circulation passage 34 has a length exceeding the circumferential dimension inside the container 3 without increasing the space in the axis X direction. The function of separating the lubricating oil 7 can be further enhanced.
[0035]
Further, the refrigerant circulation path 34 may be provided at any part between the discharge position from the compression mechanism 4 in the container 3 and the discharge port 9 of the container 3. However, in the present embodiment, as shown in FIG. 1 and FIG. 4, it is provided in the end of the container 3 on the discharge port 9 side. Thereby, it can be easily provided with a high degree of freedom by using a wider plane area in the direction perpendicular to the axis except for the compression mechanism section 4 and the electric motor 5 which are installed in the container 3 particularly in the direction of the axis X. In addition, since the refrigerant circulation passage 34 is located at the end of the container 3 on the discharge port 9 side, the cooling of the electric motor 5 and the like in the container 3 by the refrigerant 30 and the auxiliary bearing portion 41 by the lubricating oil 7 contained in the refrigerant 30 After the lubricating oil 7 is separated and discharged to the outside of the container 3, the lubricating oil 7 is advantageously supplied to an external cycle after being used for lubrication of sliding parts other than the compression mechanism unit 4. The lubricating oil 7 supplied to the compression mechanism 4 is supplied to the main bearing 42 and the eccentric bearing 43 on the compression mechanism 4 side through the liquid pools 21 and 22.
[0036]
The refrigerant circulation path 34 can be formed in any manner, for example, by bending a ready-made tube. However, a groove 45 formed on the end wall 3a of the container 3 as shown in FIG. 4 or the substrate 44 as shown in FIGS. 1, 2 and 4 attached to the container 3, and a view covering the groove 45 1, the cover member 46 as shown in FIGS. 3 and 4, and the cover member 46 covers and closes the concave streak 45 formed by molding or engraving the end wall 3a or the substrate 44. Thereby, any shape can be easily and accurately formed. In particular, when the recesses 45 are formed in the end wall 3a of the container 3, a special member for forming the recesses 45 can be omitted, which is advantageous for cost reduction, and is less likely to interfere with other objects and saves space in the container. It is also suitable for conversion. Even when the groove 45 formed on the substrate 44 is closed by the lid member 46 as in the present embodiment shown in the drawing, by mounting the substrate 44 on the container 3 together with the lid member 46, the labor for mounting is reduced by half and the cost is reduced. Can be achieved. In any case, as in this embodiment, the lid member 46 is used to introduce the refrigerant 30 discharged from the compression mechanism unit 4 from the refrigerant inlet 32 into the refrigerant circulation passage 34 into the container 3. This is convenient because the partition wall for partitioning with the discharge port 9 side of No. 3 can be shared. Dispersion holes 48 for dispersing the lubricating oil 7 separated and returned into the container 3 into the liquid reservoir 6 are provided at the lowermost portions of the substrate 44 and the lid member 46. Since it is submerged, the partition function as described above is not impaired. Of course, the substrate 44 and the lid member 46 may be attached to any position of the container 3, or may be individually attached in some cases.
[0037]
In this embodiment, as shown in FIGS. 1 and 4, the substrate 44 is applied to an annular step 71 formed near the end wall 3 a on the inner periphery of the container 3, and is attached together with the lid member 46 by screws 47. is there. A radial rib 72 slightly lower than the step 71 is provided around the housing 55 inside the end wall 3a. The rib 72 reinforces the end wall 3 a and the housing 55, and is used when the pump 7 sucks the lubricating oil 7 in the liquid storage 6 between the end wall 3 a and the substrate 44 through the suction passage 54. The movement is restricted to prevent the lubricating oil 7 from being excessively sucked up and consumed by the pump 13.
[0038]
A plurality of the refrigerant introduction ports 32, the refrigerant return ports 33, and the liquid return ports 35 may be provided in the circumferential direction of the refrigerant circulation passage 34 or in the axis X direction of the compressor 1, respectively. However, it is only necessary to provide at least one in the turning direction, and the structure is simplified. In the present embodiment, two refrigerant inlets 32 are provided in the circumferential direction as shown in FIGS. Thus, while preventing the refrigerant 30 from blowing back as in the case of providing one large refrigerant inlet 32, more refrigerant 30 is introduced into the refrigerant circulation path 34 and the introduced refrigerant 30 circulates. By increasing the speed, the effect of centrifugal separation, centrifugation and collision separation of the lubricating oil 7 is enhanced.
[0039]
Alternatively or additionally, the refrigerant inlet 32 may be provided with a refrigerant guide (not shown) such as a funnel that collects refrigerant in a wider area and guides the refrigerant to the refrigerant inlet 32. By collecting the refrigerant 30 in a wide area beyond the inlet 32 and introducing it into the refrigerant circulation path 34, the circulation speed in the refrigerant circulation path 34 is increased by the increased amount of the refrigerant 30 to be introduced. The effect of centrifugal separation, or the effect of centrifugal separation and collision separation is improved.
[0040]
The compressor 1 of the present embodiment will be described in further detail. As shown in FIG. 4, a pump 13 and a sub-bearing portion are placed in a main case 3b having the end wall 3a at the end from the end wall 3a side. 41, an electric motor 5, a main bearing member 51 having the main bearing portion 42 and an eccentric bearing portion 43 are arranged, and the pump 13 is housed from the outer surface of the end wall 3a and held between the pump 13 and the lid 52. At the same time, a pump chamber 53 communicating with the liquid storage 6 is formed inside the lid 52 so as to communicate with the liquid storage 6 through the suction passage 54. The auxiliary bearing portion 41 is supported by a housing portion 55 integrally formed inside a portion of the end wall 3a that accommodates the pump 13, so that the side of the drive shaft 14 connected to the pump 13 is supported. is there. The electric motor 5 has the rotor 5a fixed to the inner periphery of the main case 3b by shrink fitting or the like so that the drive shaft 14 can be rotated by the rotor 5b fixed around the drive shaft 14. The main bearing member 51 is fixed to the inner periphery of the main case 3b by shrink fitting or the like, and the fixed spiral component 11 is attached to the outer surface thereof with bolts 56 or the like. The compression mechanism 4 is configured with the swirling spiral part 12 interposed therebetween. Between the main bearing member 51 and the swirling spiral part 12, a rotation restraining part 57 for preventing the swirling spiral part 12 such as an Oldham ring from rotating and performing a circular motion is restrained, and the drive shaft 14 is connected to the eccentric bearing 43. The rotating spiral component 12 is connected to the rotating spiral component 12 via a circular path.
[0041]
The exposed portion of the compression mechanism 4 from the main case 3b is covered by a sub-case 3c whose opening is abutted with the main case 3b and fixed with bolts 58 or the like, and the end wall 3d of the sub-case 3c and the fixed spiral part 11 are fixed. A suction chamber 61 or a passage leading from the suction port 8 to the suction port 59 of the compression mechanism section 4 between the suction port 8 and the back section, and discharge from the discharge port 31 of the compression mechanism section 4 via the reed valve 31a to be guided to the electric motor 5 side. A chamber 62 or passage is formed.
[0042]
The discharge chamber 62 communicates with the electric motor 5 through the fixed spiral part 11 and the main bearing member 51 or a passage 63 formed between the main member 51 and the container 3. The substrate 44 of the coolant circulation path 34 has a cover portion 44 a that covers the housing portion 55 of the end wall 3 a of the container 3, and is directed toward the outer periphery of the housing portion 55, and extends along the axis X between the body portion and the container 3. The refrigerant circulation path 34 is formed using a wide donut-shaped plane space having a right angle. A power supply terminal 64 for the motor 5 is provided in the middle of the body of the container 3 to prevent the compressor 1 from increasing in the direction of the axis X.
[0043]
【The invention's effect】
According to the compressor of the present invention, the refrigerant that has been discharged from the compression mechanism into the container and is on its way to the discharge port of the container is confined by introducing the refrigerant circulation passage from the refrigerant introduction port and circulates around the axis of the compressor. After that, in order to return the refrigerant from the refrigerant return port to the discharge port side of the container, the refrigerant circulation path simply centrifugs the refrigerant discharged from the compression mechanism in one direction and performs centrifugal separation or centrifugation according to the path form. It is not necessary to use a wide passage as in the case of securing the reverse flow of the refrigerant as in the cyclone type, and it is possible to obtain a long circulation distance inside the container and obtain a separation performance proportional to it, Since the compressor is elongated in the circumferential direction and has a very small width in the axial direction of the compressor, the compressor can be further reduced in size and weight without lowering the liquid separation performance.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing one example of a separation mechanism of a refrigerant and a lubricating oil of a compressor according to an embodiment of the present invention.
FIGS. 2A and 2B show a substrate having a concave streak forming a refrigerant circulation path of the separation mechanism unit in FIG. 1, wherein FIG. 2A is a front view, and FIG. c) is a sectional view seen from another angle.
3A and 3B show a lid member forming a refrigerant circulation passage together with the substrate of FIG. 2, wherein FIG. 3A is a front view and FIG. 3B is a cross-sectional view.
FIG. 4 is a cross-sectional view of the entire compressor having the separation mechanism of FIG.
[Explanation of symbols]
1 compressor
3 containers
3a End wall
4 Compression mechanism
5 Electric motor
6 Reservoir
7 Lubricating oil
8 Container inlet
9 Container outlet
13 pump
14 Drive shaft
30 refrigerant
31 Discharge port of compression mechanism
32 refrigerant inlet
33 Refrigerant return port
34 Refrigerant circulation path
34a Large bend
34b small bending part
34c straight section
35 Liquid return port
X axis

Claims (9)

In a container, a compressor having at least a compression mechanism for performing suction, compression and discharge of the refrigerant, and a liquid storage for storing a liquid for lubricating a sliding part including the compression mechanism,
The refrigerant discharged from the compression mechanism into the container is introduced from the refrigerant inlet and circulates around the axis of the compressor, and the liquid is returned from the refrigerant return port to the container outlet while the liquid is centrifuged or centrifugally separated by collision. A circulation path is provided in the container, and a liquid return port for returning the liquid to be centrifuged into the container has a gravity direction component in the passage wall in the middle and is provided in a direction deviating from the circulation direction of the refrigerant. Compressor. In the container, at least a compression mechanism for sucking, compressing and discharging the refrigerant, and a liquid storage for storing a liquid for lubricating a sliding part including the compression mechanism are provided. Horizontal compressor installed
The refrigerant discharged from the compression mechanism into the container is introduced from the refrigerant inlet at the top of the container and circulates around the axis of the compressor. A refrigerant circulation path for returning from the upper refrigerant return port is provided, and the return port for returning the liquid to be centrifugally separated has a gravitational direction component on the way passage wall on the lower side and deviates from the circumferential direction of the refrigerant. A compressor provided in a direction. The compressor according to any one of claims 1 and 2, wherein the refrigerant circulation path is provided on the same plane. The compressor according to any one of claims 1 to 3, wherein the refrigerant circulation passage is provided in an end of the container on the discharge port side. The compressor according to any one of claims 1 to 4, wherein the refrigerant circulation passage is formed by a concave line formed on an end wall of the container or a substrate attached to the container, and a lid member that covers the concave line. The compressor according to claim 5, wherein the substrate is attached to the container together with the lid member. The compressor according to any one of claims 1 to 5, wherein at least one refrigerant inlet, a refrigerant return port, and a liquid return port are provided in a circumferential direction of the refrigerant. The compressor according to any one of claims 1 to 7, wherein a refrigerant introduction guide is provided at the refrigerant introduction port to collect the refrigerant in a wider area and guide the refrigerant to the refrigerant introduction port. The compressor according to any one of claims 1 to 8, wherein a motor for driving the compression mechanism is housed in the container.

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